Ol' Myrt here particularly liked the 1910-1940 (US) Census Street Finder, which pointed me to Salt Lake City, Simplified written by Stephen P. Morse and Marie Taylor. Here the explanation of the changes in 1973 which changed 2nd west to 1st West, and 2nd North to 1st north. This is the best explanation for why my father’s birthplace is a “block off” from his recollection. His recollection was correct, according to the old address format.

If you are interested detailed 20th century research, including understanding Enumeration Districts assignments for the 1910-1940 US Federal Census records, you’ll want to read Which One-Step Census Forms Should I use? By Stephen P. Morse, PhD, Joel D. Weintraub, PhD and David R. Kehs, PhD.